package com.heima.wemedia.service.impl;

import com.alibaba.fastjson.JSONArray;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.heima.apis.article.IArticleClient;
import com.heima.common.aliyun.GreenImageScan;
import com.heima.common.aliyun.GreenTextScan;
import com.heima.common.tess4j.Tess4jClient;
import com.heima.file.service.FileStorageService;
import com.heima.model.article.dto.ArticleDto;
import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.common.enums.AppHttpCodeEnum;
import com.heima.model.wemedia.pojo.WmChannel;
import com.heima.model.wemedia.pojo.WmNews;
import com.heima.model.wemedia.pojo.WmSensitive;
import com.heima.model.wemedia.pojo.WmUser;
import com.heima.utils.common.SensitiveWordUtil;
import com.heima.wemedia.mapper.WmChannelMapper;
import com.heima.wemedia.mapper.WmNewsMapper;
import com.heima.wemedia.mapper.WmSensitiveMapper;
import com.heima.wemedia.mapper.WmUserMapper;
import com.heima.wemedia.service.WmNewsAutoScanService;
import lombok.extern.slf4j.Slf4j;
import org.apache.avro.data.Json;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.util.*;
import java.util.stream.Collectors;

/**
 * @Description: test
 * @Create by: JJ菜菜
 * @Date: 2022/1/17 22:37
 */
@Service
@Transactional
@Slf4j
public class WmNewsAutoScanServiceImpl implements WmNewsAutoScanService {

    @Autowired
    private WmNewsMapper wmNewsMapper;

    @Autowired
    private FileStorageService fileStorageService;

    /**
     * 自媒体文章审核
     * @param id
     */
    @Override
    @Async // 标明当前方法是一个异步方法
    public void autoScanWmNews(Integer id) {
        // 1. 查询自媒体文章
        WmNews wmNews = wmNewsMapper.selectById(id);
        if (wmNews == null){
            throw new RuntimeException("WmNewsAutoScanServiceImpl-文章不存在");
        }


        if (wmNews.getStatus().equals(WmNews.Status.SUBMIT.getCode())){
            // 从内容中提取纯文本内容和图片,
            Map<String, Object> textAndImages =  handleTextAndImages(wmNews);


            // 添加自管理的敏感词过滤
            boolean isSensitive = handleSensitiveScan((String) textAndImages.get("content"), wmNews);
            if (isSensitive){
                return;
            }


            // 2. 审核文章内容， 阿里云接口
            String content = (String)textAndImages.get("content");
            boolean isTextScan = handleTextScan(content, wmNews);
            // 如果审核部通过就停止
            if (!isTextScan){
                return;
            }
            // 3. 审核图片， 阿里云接口
            List<String> images = (List<String>)textAndImages.get("images");
            boolean isImageScan = handleImageScan(images, wmNews);
            if (!isImageScan){
                return;
            }
            // 4. 审核成功，保存app端的相关文章数据
            ResponseResult responseResult = saveAppArticle(wmNews);
            if (!responseResult.getCode().equals("200")){
                throw new RuntimeException("WmNewsAutoScanServiceImpl-文章审核，保存app端相关文章失败");
            }

            // 回填article_id
            wmNews.setArticleId((Long) responseResult.getData());
            updateWmNews(wmNews, (short)9, "审核成功");
        }

    }

    @Autowired
    private WmSensitiveMapper wmSensitiveMapper;

    /**
     *
     * 自管理的敏感词审核
     * @param content
     * @param wmNews
     * @return
     */
    private boolean handleSensitiveScan(String content, WmNews wmNews){
        boolean flage = true;
        // 获取所有的敏感词
        List<WmSensitive> wmSensitives = wmSensitiveMapper.selectList(Wrappers.<WmSensitive>lambdaQuery().select(WmSensitive::getSensitives));
        // 获取敏感词
        List<String> sensitiveList = wmSensitives.stream().map(WmSensitive::getSensitives).collect(Collectors.toList());
        // 初始化敏感词裤
        SensitiveWordUtil.initMap(sensitiveList);
        // 查看文章中是否包含敏感词
        Map<String, Integer> map = SensitiveWordUtil.matchWords(content);

        // 如果文章内容存在违规，就修改文章，将违章内容存到数据库
        if (map.size() > 0) {
            updateWmNews(wmNews, (short) 2, "当前文章存在违规内容");
            flage = false;
        }
        return flage;
    }

    /**
     * 修改文章内容
     * @param wmNews
     * @param status
     * @param reason
     */
    private void updateWmNews(WmNews wmNews, short status, String reason) {
        wmNews.setStatus(status);
        wmNews.setReason(reason);
        wmNewsMapper.updateById(wmNews);

    }

    @Autowired
    private WmChannelMapper wmChannelMapper;

    @Autowired
    private WmUserMapper wmUserMapper;

    @Autowired
    private IArticleClient articleClient;

    /**
     * 保存app端相关的文章数据
     * @param wmNews
     * @return
     */
    private ResponseResult saveAppArticle(WmNews wmNews) {

        ArticleDto dto = new ArticleDto();
        BeanUtils.copyProperties(wmNews, dto);
        // 文章的布局
        dto.setLayout(wmNews.getType());
        // 频道
        WmChannel wmChannel = wmChannelMapper.selectById(wmNews.getChannelId());
        if (wmChannel != null){
            dto.setChannelName(wmChannel.getName());
        }
        // 作者
        dto.setAuthorId(wmNews.getUserId().longValue());
        WmUser wmUser = wmUserMapper.selectById(wmNews.getUserId());
        if (wmUser != null){
            dto.setAuthorName(wmUser.getName());
        }

        // 设置文章
        if (wmNews.getArticleId() != null){
            dto.setId(wmNews.getArticleId());
        }

        dto.setCreatedTime(new Date());

        ResponseResult responseResult = articleClient.saveArticle(dto);

        return responseResult;
    }


    @Autowired
    private GreenImageScan greenImageScan;

    @Autowired
    private Tess4jClient tess4jClient;

    /**
     * 图片审核
     * @param images
     * @param wmNews
     * @return
     */
    private boolean handleImageScan(List<String> images, WmNews wmNews) {

        boolean flage = true;
        if (images == null || images.size() == 0){
            flage = false;
        }

        List<byte[]> imageList = new ArrayList<>();

        // 使用strem流对传入的图片去重
        images = images.stream().distinct().collect(Collectors.toList());
        try {
            for (String image : images) {
                byte[] bytes = fileStorageService.downLoadFile(image);

                // 图片文字审核
                // 从byte转换为BufferedImage
                ByteArrayInputStream in = new ByteArrayInputStream(bytes);
                BufferedImage imageFile = ImageIO.read(in);
                // 识别图片的文字
                String result = tess4jClient.doOCR(imageFile);
                // 审核是否包含自管理的敏感词
                boolean isSensetive = handleSensitiveScan(result, wmNews);
                if (!isSensetive) {
                    return isSensetive;
                }


                imageList.add(bytes);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }

        try {
            Map map = greenImageScan.imageScan(imageList);
            if (map != null) {
                // 审核失败
                if (map.get("suggestion").equals("block")) {
                    flage = false;
                    updateWmNews(wmNews, (short) 2, "当前图片中存在违规内容");
                }

                // 不确定的信息，需要人工审核
                if (map.get("suggestion").equals("review")) {
                    flage = false;
                    updateWmNews(wmNews, (short) 3, "文章中存在不确定的内容");
                }

            }
        } catch (Exception e) {
            flage = false;
            e.printStackTrace();
        }

        return flage;

    }


    @Autowired
    private GreenTextScan greenTextScan;
    /**
     * 审核纯文本内容
     * @param content
     * @param wmNews
     * @return
     */
    private boolean handleTextScan(String content, WmNews wmNews) {

        boolean flage = true;

        // 空文本也可
        if ((wmNews.getTitle() + "-" + content).length() == 0) {
            return flage;
        }

        try {
            Map map = greenTextScan.greeTextScan(content);
            if (map != null){
                if (map.get("suggestion").equals("block")){
                    flage = false;
                    updateWmNews(wmNews, (short) 2, "当前文章存在违规内容");
                }

                if (map.get("suggestion").equals("review")){
                    flage = false;
                    updateWmNews(wmNews, (short) 3, "当前文章中存在不确定内容");
                }

            }
        } catch (Exception e) {
            flage = false;
            e.printStackTrace();
        }

        return flage;
    }

    /**
     * 1. 从自媒体文章的内容中提取文本和图片
     * 2. 提取文章的封面图片
     *
     * @param wmNews
     * @return
     */
    private Map<String, Object> handleTextAndImages(WmNews wmNews) {

        // 存储文本
        StringBuilder stringBuilder = new StringBuilder();

        List<String> images = new ArrayList<>();

        // 1. 从自媒体文章内容提取文本和图片
        if (StringUtils.isNotBlank(wmNews.getContent())){

            List<Map> maps = JSONArray.parseArray(wmNews.getContent(), Map.class);
            for (Map map : maps) {
                // 拼接文本
                if (map.get("type").equals("text")){
                    stringBuilder.append(map.get("value"));
                }

                if (map.get("type").equals("image")){
                    images.add((String) map.get("value"));
                }
            }
        }

        // 2. 提取文章的封面图片
        if (StringUtils.isNotBlank(wmNews.getImages())){

            String[] split = wmNews.getImages().split(",");
            images.addAll(Arrays.asList(split));
        }

        // 将图片和文本内容进行封装
        Map<String, Object> resultMap = new HashMap<>();
        resultMap.put("content", stringBuilder.toString());
        resultMap.put("images", images);

        return resultMap;
    }
}
